Publish AAR to jCenter and Maven Central

Now I'm going to list how to publish an Android libray to jCenter and then syncronize it with Maven Central:

I use "Android Studio" and I have this simple android lib that I would like to be available on maven: CircularImageView

In the library folder(module) I have the lib code abovementioned. And applying in the build.gradle of this folder apply plugin: 'com.android.library' I got as output an .aar in the build/outputs/aar/ directory of the module's directory